Analysis of quantitative trait loci affecting growth traits of Kermani sheep on chromosomes 1, 3 and 6

The population studied hare was consisted 267 lambs from six half-sib families. each family contained 40 to 50 lambs. The genotype of all six male parent and their progeney determined for 243 microsatellite on chromosome. Growth on traits (birth weight, 3 month weight, 6 month weight and 9 month weight) recorded on all of progeny. The interval mapping method based on the least squares regression was used for analysis of gene position related to quantitative trait loci (QTL).The QTL of birth weight, 3 month weight, 6 month weight traits on chromosome 1 located on regions 30-34, 90-91 and 68-71 cM to centromere. The closest markers to QTL were MCM13, MAF4, and DIK5034, respectively. Gene position of QTL affective on birth weight on chromosome 3 was located on 26 cM and near marker was OARVH130. QTL related with 6 month weight on this chromosome was located on 69 cM to centromere and vicinal to marker MNS37A. The results showed the controlling QTL of birth weight on chromosome 6 was located on position 58-62 cM to centromere. Chromosome 1 had maximum and chromosome 6 had minimum QTL for traits checked and every three chromosome had birth weight control genome position but significant QTL for 9 month weight was not identify on any chromosome.